NATO does not have 'dues', but each nation is signed on to contribute 2% of it's GDP to mutual defense. U.S. GDP is $23.32 TRILLION. That would be $466 billion 400 million U.S. commitment. How are we doing so far? Well, about 10 % of what we committed to by treaty, Less than half of what other NATO nations have contributed. I would call that a bit slacking on OUR part. Or don't you do math?